There's this myth that automated spam detection is hard because spammers are all very clever masters of disguise.

No. Spammers are stupid as a shoe. They have dog shit for brains.

Automated spam detection is hard because the line between spam and "legitimate" marketing activity is a fiction.

@danslimmon

Woof, so much this. I get so much "spam but supposedly not spam" in my line of work. It's nuts.
And it's very hard to attack the spam as spam because my email is (and kinda has to be) public.